Airborne 12.09.16

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Airborne 12.09.16

AD NUMBER: 2007-06-10
MANUFACTURER: Rolls Royce
SUBJECT: Airworthiness Directive 2007-06-10SUMMARY: The FAA is superseding an existing
airworthiness directive (AD) for Rolls Royce plc (RR) RB211-524
series turbofan engines with certain part number (P/N) intermediate
pressure compressor (IPC) stage 5 disks installed. That AD
currently requires new reduced IPC stage 5 disk cyclic limits. This
AD requires the same reduced IPC stage 5 disk cyclic limits,
requires removal from service of affected disks that already exceed
the new reduced cyclic limit, and, removal from service of other
affected disks before exceeding their cyclic limits using a
drawdown schedule. This AD also exempts disks reworked to RR
Service Bulletin (SB) No. RB.211-72-E182, Revision 1, dated July
30, 2004, and allows an on-wing eddy current inspection (ECI) on
RB211-524G and RB211-524H series engines. This AD results from the
manufacturer issuing a revised Alert Service Bulletin (ASB) to
remove certain disks from applicability, and to allow an on-wing
ECI on RB211-524G and RB211-524H series engines. We are issuing
this AD to prevent failure of the IPC stage 5 disk, which could
result in uncontained engine failure and possible damage to the
airplane.